Solar flares on October 18, 2026
The most powerful solar flare in 24 hours
C3.8 (normal) flare - October 18 at 6:44 AM
Solar activity index
Value as of the end of the day on October 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 17, 2026 to October 18, 2026
Time zone — UTC+00
List of solar flares for October 18, 2026
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.8 | 06:32 | 06:44 | 06:58 | — |
| C3.4 | 03:32 | 03:53 | 04:09 | 4557 |